C11111333133313232233133313331333133112111112113313232213113121   >>    C1111133313331323223313331333133313311211111211331323221311312   <<    C11111333133313232233133313331333133112111112113313232213113123   >>      C11111333133313232233133313331333133112111112113313232213113122   >>